Tbip-hammer



W. VAN ANDEN.

Trip Hammer.

Patented Aug. 16, 1853.

any suitable manner.

NITED STATES PATENT OFFICE.

WILLIAM VAN ANDEN, OF POUGHKEEPSIE, NEW YORK.

TRIP-HAMMER.

Specification of Letters Patent No. 9,942, dated August 16, 1853.

T 0 @ZZ whom t may concern Be it known that I, WILLIAM VAN ANDEN, of Poughkeepsie, in the county o-f Dutchess and State of New York, have invented a new and Improved Trip-Hammer; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, is a plan or top view of my improved trip-hammer. Fig. 2, is a side elevation of the same. Fig. 3 is a section, showing more particularly one of the eccentrics, and vibrating friction rollers.

Similar letters of reference indicate corresponding parts. in each of the several figures.

This invention relates to certain improvements in trip-hammers, and consists :-lst, in having the hammer shaft attached to a collar, which works loosely around a shaft to which a spring which forces down the hammer shaft, is attached. The spring is made to act more or less upon the hammer shaft, by means of a set screw and lever, against which a cam operates. By this arrangement, as will be hereafter shown, the hammer may be made to descend with greater or less force, as desired.

2nd, my invention consists in the employment or use of vibrating friction rollers, attached to the hammer shaft, by which vibrating rollers, the most prominent parts of the cams which elevate the hammer, are relieved, instantaneously, of the pressure of the hammer shaft, directly said prominences have passed the centers of the vibrating rollers.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, represents a frame, resting upon a bedpiece, B. The frame may be constructed in On the front part of the frame, A, there is placed, transversely, a shaft, C, having two cams, D, D, uponit, and also a cam, E, on the outer side of the frame; see Fig. 1.

F, is a shaft, placed transversely on the back part of the frame, and working in suitable bearings, (a), (a). To the center of this shaft, a spring, Gr, is attached; and, at one end, an arm, H, having a set screw, (Z1), through it.

I, is a lever placed loosely on the shaft, F;

L, which fits loosely around the shaft, F, to

which the spring, G, is attached; as seen in Fig. 1.

M, is the anvil or block, on which the hammer strikes.

N, N, are two friction rollers, attached to a frame, O, the upper part of which is attached to a small shaft, P, working in bearings, (0), (o) on the hammer-shaft, J. The gicltDion rollers bear or rest upon the cams,

Operation: This willreadily be seen. The shaft, C, is made to rotate, by hand or otherwise; and the cams, D, D, which rotate with the shaft, C, and bear 4against the friction rollers, N, N, elevate the hammer-shaft, J. The cam, E, as it rotates, bears upon and depresses the lower end of the lever, I. The upper end of the lever, I, consequently bears against the set-screw, (b), and the shaft, F, to which the spring, Gr, is attached, is turned; and the spring, G, bears or presses upon the hammer-shaft, J and, when the highest points of the cams, D, D, have passed the lowest centers of the friction rollers, N, N, the spring, G, of course forces the hammer shaft, J, downward, and the hammer, K, strikes the anvil or block, M.

By depressing or elevating the set-screw, (Z2), there will be a greater or less pressure of the spring, G, upon the hammer-shaft; for, by depressing the screw, (L-(see Fig. 2,)-the lower end of the lever, I, is elevated, and brought nearer the cam, E; consequently, there will be a greater action of the cam, E, upon the lever, I, and the shaft, F, will be turned considerably, and the spring, Gr, be made to bear with increased pressure upon the hammer shaft. The reverse takes place, when the set screw is elevated, as will be readily understood.

The cams, D, D, are relieved, instantaneously, of the pressure of the friction rollers, after the highest points of the cams have passed the lowest centers of the rollers; for the frame, O, vibrates, and throws the rollers 0E consequently, the short angles of the cams will not become worn and rounded, as would be the case, if the rollers were iiXed permanently to the hammer-shaft.

I do not claim elevating the hammershaft by means of cams; neither do I claim the friction rollers, irrespective of the par ticular manner of arranging or attaching J'Ehem to the hammer-shaft, as herein shown;

Having thus described the nature and operation of my invention, what I claim as new, and desire to secure by Letters Patent,

l. Attaching a collar, L, to one end of the hammer shaft, J said collar, L, Working over a shaft, F, which has a spring, Gr, attached toit, for the purpose of forcing down the hammer-shaft. The shaft, F,

being provided with a set-screw, (b), or its equivalent, and lever, I, arranged as described, by Which, upon properly adjusting said set-screw, or its equivalent, the hammer WVM. VAN ANDEN.

Witnesses O. D. MUNN,

En. POLHAMUS. 

